Waste Disposal Plant Combustion Grate Lateral Beam Design
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Solution Overview
Problem
The existing waste disposal plant combustion grates face issues with the positioning of sliding and limiting elements, which leads to increased risk of malfunctions due to exposure to ashes, difficulty in inspection and maintenance, and impaired air flow, as these elements are separated and positioned along the symmetry axis, hindering correct combustion air distribution.
Innovation Solution
The combustion grate design incorporates a carrying frame with lateral beams and transversal cross-beams connected by a structural knot, featuring wheel assemblies and bearing supports that allow movement while maintaining air-tight seals, reducing the need for separate supporting elements and improving accessibility for lubrication and maintenance, and ensuring proper air flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If sliding and limiting elements are positioned along the symmetry axis of the grate, then the structure is simplified, but the risk of malfunctions increases due to exposure to ashes and difficulty in maintenance
Solution Approach 1:
The patent extracts the sliding and limiting elements from the central symmetry axis position and relocates them to the lateral periphery of the grate structure. This extraction removes the elements from the harmful environment (ashes falling in the pressurized volume) while maintaining the structural functionality. The elements are now positioned where they can be easily accessed for maintenance and lubrication without interfering with the central air flow paths.
2Strength
If sliding and limiting elements are positioned along the symmetry axis, then structural support is consolidated, but accessibility for lubrication and maintenance becomes difficult
Solution Approach 1:
The patent transitions the positioning of sliding and limiting elements from a central vertical dimension (symmetry axis) to a lateral horizontal dimension (periphery of the grate). This dimensional change allows maintenance personnel to access the elements from the sides of the grate structure, making lubrication and inspection straightforward operations without requiring disassembly or complex access procedures.
3Reliability
If separate supporting elements are dedicated to sliding and limiting elements, then each element is properly supported, but the air flow distribution is impaired
Solution Approach 1:
The patent merges the supporting function for sliding and limiting elements with the existing lateral beam structure of the grate. Instead of adding separate supporting elements that would obstruct air flow, the invention integrates the element supports into the lateral beams, which are already part of the grate's structural framework. This merging maintains proper element support while preserving the air flow paths through the grate structure.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design enhances the reliability and maintainability of the grate by reducing the risk of malfunctions, simplifying maintenance, and ensuring efficient combustion air distribution, thereby supporting continuous operation and minimizing downtime.
Implementation Method 1
wheel assemblies (39) able to determine the sliding between the two frames and elements (12) limiting the movement between them
Implementation Method 2
The combustion air has in fact the double function of providing the oxygen for the oxidation of the waste
Implementation Method 3
The surface of the grate is hit only occasionally by the radiation of the flame
Implementation Method 4
The actuation system is normally made of hydraulic pistons
Data Source
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AI summary
A waste disposal plant comprising a combustion chamber (2) inside which waste laid on a combustion grate (3) are burnt, which grate permits the entrance of an adequate quantity of combustion air in the chamber through it. Said combustion grate comprises at least a handling group formed by a plurality of fire bars or plates (7), which move alternatively one with respect to the other by advancing the waste on said grate. Handling means allow the alternate movement of the fire bars (7) which are divided in movable fire bars (7a) and fixed fire bars (7b), alternately disposed one with respect to the other, on transversal rows resting one upon the other according to a longitudinal placement with alternate steps.